Text Books:
1. Oppenheim A.V., Willsky A.S. and Young I.T., “Signals and Systems”, Second Edition,1997,Prentice Hall.
2. Simon Haykin and Barry Van Veen, “Signals and Systems”, Second Edition, Wiley International.

Reference Books:
1. R.F. Ziemer, W.H Tranter and J.D.R.Fannin, “Signals and Systems - Continuous and Discrete”, Forth Edition Prentice Hall.
2. M. J. Roberts, “Signals and Systems”,2003, Tata McGraw-Hill.